Control system for heating and cooling apparatus of building
First Claim
1. A control system for a heating and cooling apparatus of a building comprising:
- a fluid-actuated controller having a fluid inlet and a fluid outlet, the fluid outlet having a first, fluid-actuated valve coupled therewith, the valve being actuated in response to the volume rate of flow of fluid from the controller through the outlet thereof, said valve being adapted to control a fluid operable to provide heating and cooling energy to said apparatus;
a fluid line coupled to the inlet of the controller;
a source of air pressure coupled with the fluid line;
a second, temperature responsive valve coupled with said air pressure source for controlling the volume rate of a first flow of fluid from the source to the inlet of the controller; and
a control device coupled with the temperature responsive valve for controlling the volume rate of flow of a second flow of fluid from the source to the inlet of the controller, said control device including a support, a lever pivotally mounted intermediate its ends on the support for movement about a central axis, a pair of spaced bimetallic elements on the lever on opposite sides of the central axis, and means coupled with each element, respectively, for selectively changing the temperature of the same, said lever being coupled to said second valve, whereby shifting of the lever in said opposed directions causes an increase and decrease, respectively, in the volume rate of flow of fluid controlled by the second valve.
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Accused Products
Abstract
An improved control system for controlling the heating and cooling of a building or home including an improved control device forming a component of the control system. The control device includes a lever which can pivot about a central axis intermediate the ends of the lever, each end of the lever having a bimetallic element adjacent to and above a resistance heating element. The outer end of the bimetallic element coupled to one end of the lever engages an adjustable stop. The other bimetallic element is in engagement with a resilient blade which, depending upon its operative position, controls the flow of a fluid through a tube, the fluid flow through the tube being a function of the operative condition of the adjacent bimetallic element. The fluid flow through the tube determines how a fluid-actuated controller is operated to control a valve which provides heating and cooling fluid for heating and cooling a space. The control system of the present invention can operate a normal fashion under the influence of a thermostat through one part of a day and can then operate under the influence of the control device during another part of the day, such as during the nighttime hours when heating and cooling requirements are at a minimum.
11 Citations
20 Claims
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1. A control system for a heating and cooling apparatus of a building comprising:
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a fluid-actuated controller having a fluid inlet and a fluid outlet, the fluid outlet having a first, fluid-actuated valve coupled therewith, the valve being actuated in response to the volume rate of flow of fluid from the controller through the outlet thereof, said valve being adapted to control a fluid operable to provide heating and cooling energy to said apparatus; a fluid line coupled to the inlet of the controller; a source of air pressure coupled with the fluid line; a second, temperature responsive valve coupled with said air pressure source for controlling the volume rate of a first flow of fluid from the source to the inlet of the controller; and a control device coupled with the temperature responsive valve for controlling the volume rate of flow of a second flow of fluid from the source to the inlet of the controller, said control device including a support, a lever pivotally mounted intermediate its ends on the support for movement about a central axis, a pair of spaced bimetallic elements on the lever on opposite sides of the central axis, and means coupled with each element, respectively, for selectively changing the temperature of the same, said lever being coupled to said second valve, whereby shifting of the lever in said opposed directions causes an increase and decrease, respectively, in the volume rate of flow of fluid controlled by the second valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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11. A control device for a fluid-actuated control system of a heating and cooling apparatus comprising:
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a support; a lever pivotably mounted on the support for rotation about a central axis intermediate the ends of the lever; a pair of bimetallic elements secured to the lever on opposite sides of said axis; means on a support for changing the temperature of each bimetallic element, respectively, said changing means for each bimetallic element adapted to be coupled to an actuator for selective actuation thereby; means on the support for defining a stop engaging one of the bimetallic elements; means on the support for defining a fluid passage; a shiftable valve member carried by the support and being operable to open and close said fluid passage, the other bimetallic element being coupled to the valve member, there being a means biasing the valve member in a predetermined direction relative to said tube, whereby the operative positions of the bimetallic element determine the volume rate of flow of fluid through the tube. - View Dependent Claims (10, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification